Hello Rajashekhara, Sudhakar, Rajashekhara, Sudhakar wrote: > Hi, > > On Fri, Dec 02, 2011 at 13:05:22, Heiko Schocher wrote: >> Hello, >> >> trying Linux 3.2.0-rc3 on an am1808 based board using MMCSD1 controller, >> and facing problems with using DMA. Deactivating use_dma=0 in the >> davinci_mmc controller and mmc works in pio mode without problems. >> So there are no hardware problems, pinmux is ok, psc are all on. >> > > Please refer to the discussion at [1] where similar issue was discussed. Go through the Oh, sorry, missed this! Thanks for the hint! > entire thread. In the patch posted by Juha in this link, I see that except for the below > hunk all others are integrated. > > @@ -1508,7 +1506,7 @@ static int __init edma_probe(struct platform_device *pdev) > * started by the codec engine will not cause audio defects. > */ > for (i = 0; i < edma_info[j]->num_channels; i++) > - map_dmach_queue(j, i, EVENTQ_1); > + map_dmach_queue(j, i, edma_info[j]->default_queue); > > queue_tc_mapping = info[j].queue_tc_mapping; > queue_priority_mapping = info[j].queue_priority_mapping; > > Can you check whether the above patch fixes your issue? Yuhu! that works for me! But I had to fix it a little, because "edma_info" is now named "info". Here my diff: diff --git a/arch/arm/mach-davinci/dma.c b/arch/arm/mach-davinci/dma.c index da90103..e10a251 100644 --- a/arch/arm/mach-davinci/dma.c +++ b/arch/arm/mach-davinci/dma.c @@ -1513,7 +1513,7 @@ static int __init edma_probe(struct platform_device *pdev) * started by the codec engine will not cause audio defects. */ for (i = 0; i < edma_cc[j]->num_channels; i++) - map_dmach_queue(j, i, EVENTQ_1); + map_dmach_queue(j, i, info[j]->default_queue); queue_tc_mapping = info[j]->queue_tc_mapping; queue_priority_mapping = info[j]->queue_priority_mapping; > [1] http://www.mail-archive.com/davinci-linux-open-source@xxxxxxxxxxxxxxxxxxxx/msg17926.html Do you prepare a patch, or should I send it? bye, Heiko -- DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html